Trane 4TTX7 User Manual

18-AC125D1-1A-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service
information pack upon completion of work.
Condensing Units
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split
systems are AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-
door split systems are maximum efficiency, optimum performance and the best overall system reliability.
4TTX7
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations ............................................. 3
Section 3. Unit Preparation .................................................................... 5
Section 4. Setting the Unit ..................................................................... 5
Section 5. Refrigerant Line Considerations ......................................... 6
Section 6. Refrigerant Line Routing ..................................................... 8
Section 7. Refrigerant Line Brazing ...................................................... 9
Section 8. Refrigerant Line Leak Check ............................................. 11
Section 9. Evacuation .......................................................................... 12
Section 10. Service Valves .................................................................. 12
Section 11. Electrical - Low Voltage ................................................... 13
Section 12. Electrical - High Voltage .................................................. 15
Section 13. Start Up .............................................................................. 16
Section 14. System Charge Adjustment ............................................. 17
Section 15. Checkout Procedures ...................................................... 22
Section 16. Refrigerant Circuits .......................................................... 23
Section 17. Wiring Diagrams ............................................................... 25
Section 18. Pressure Curves ............................................................... 31
Installation and Operation Manual

Trane 4TTX7 Specifications

General

Brand	Trane
Model	4TTX7
Category	Heat Pump
Language	English

Summary

Safety

Safety Warnings and Precautions

Important safety warnings regarding electrical components, refrigerant handling, and compressor temperature.

Unit Location Considerations

Unit Dimensions and Weight

Details the physical size and weight of different condensing unit models.

Refrigerant Piping Limits

Specifies maximum lengths and vertical changes for refrigerant lines.

Suggested Locations for Best Reliability

Provides recommendations for optimal placement to ensure system reliability and airflow.

Cold Climate Considerations

Outlines precautions for installations in areas with snow and freezing temperatures.

Unit Preparation

Prepare The Unit For Installation

Describes the initial steps for preparing the condensing unit before installation.

Setting the Unit

Pad Installation

Details requirements for installing the unit on a support pad.

Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Lists the correct sizes for vapor and liquid lines and service valve connections.

Factory Charge

Information about the factory refrigerant charge and verification methods.

Required Refrigerant Line Length

Instructions for measuring and recording line length for system calculations.

Refrigerant Line Insulation

Emphasizes the importance of insulating the vapor line to prevent contact.

Reuse Existing Refrigerant Lines

Precautions to take when using previously installed refrigerant lines.

Refrigerant Line Routing

Precautions

Guidelines for routing refrigerant lines to prevent noise and ensure proper installation.

Refrigerant Line Brazing

Braze The Refrigerant Lines

Step-by-step instructions for brazing refrigerant lines to service valves.

Refrigerant Line Leak Check

Check For Leaks

Procedure for pressurizing lines with nitrogen and checking for leaks.

Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Steps for evacuating the system to the required micron level.

Service Valves

Open the Gas Service Valve

Instructions on how to properly open the gas service valve.

Open the Liquid Service Valve

Critical steps for opening the liquid service valve with safety warnings.

Electrical - Low Voltage

Low Voltage Maximum Wire Length

Table defining maximum wire lengths for low voltage connections based on gauge.

Low Voltage Hook-up Diagrams

Wiring diagrams illustrating low voltage connections for various thermostats and air handlers.

Electrical - High Voltage

High Voltage Power Supply

Guidelines for connecting the high voltage power supply according to nameplate and codes.

High Voltage Disconnect Switch

Recommendation for installing a separate disconnect switch for high voltage connections.

High Voltage Ground

Requirement to ground the outdoor unit according to national, state, and local codes.

System Start Up

System Start Up

Steps to follow for safely starting up the installed system.

System Charge Adjustment

Temperature Measurements

Instructions for measuring outdoor and indoor temperatures for charge adjustment.

Subcooling Charging in Cooling (Above 55° F Outdoor Temp.)

Procedure for adjusting system charge using subcooling method for outdoor temps above 55°F.

Subcooling Charging Below 55° F Outdoor Temp.

Recommended method for charging at outdoor temps below 55°F using weigh-in method.

Checkout Procedures

Operational And Checkout Procedures

A checklist of final operational and system checks after installation.

Refrigerant Circuits

Refrigerant Circuit Diagrams (2 & 3 Ton Units)

Schematic diagrams illustrating refrigerant flow for 2 and 3 ton units.

Refrigerant Circuit Diagrams (4 Ton Units)

Schematic diagrams illustrating refrigerant flow for 4 ton units.

Refrigerant Circuit Diagrams (5 Ton Units)

Schematic diagrams illustrating refrigerant flow for 5 ton units.

Wiring Diagrams

2 & 3 Ton Units Wiring Diagrams

Wiring diagrams, legends, and connection details for 2 and 3 ton units.

4 Ton Units Wiring Diagrams

Wiring diagrams, legends, and connection details for 4 ton units.

5 Ton Units Wiring Diagrams

Wiring diagrams, legends, and connection details for 5 ton units.

Pressure Curves

4TTX7024E1 Cooling Performance Curves (First Stage)

Pressure curves for the 4TTX7024E1 unit during first stage cooling operation.

4TTX7024E1 Cooling Performance Curves (Second Stage)

Pressure curves for the 4TTX7024E1 unit during second stage cooling operation.

4TTX7036E1 Cooling Performance Curves (First Stage)

Pressure curves for the 4TTX7036E1 unit during first stage cooling operation.

4TTX7036E1 Cooling Performance Curves (Second Stage)

Pressure curves for the 4TTX7036E1 unit during second stage cooling operation.

4TTX7048E1 Cooling Performance Curves (First Stage)

Pressure curves for the 4TTX7048E1 unit during first stage cooling operation.

4TTX7048E1 Cooling Performance Curves (Second Stage)

Pressure curves for the 4TTX7048E1 unit during second stage cooling operation.

4TTX7060E1 Cooling Performance Curves (First Stage)

Pressure curves for the 4TTX7060E1 unit during first stage cooling operation.

4TTX7060E1 Cooling Performance Curves (Second Stage)

Pressure curves for the 4TTX7060E1 unit during second stage cooling operation.